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Finding the Fourth Proportional to 71,281, 98,254.46 and 56,149.72

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Solution

The fourth proportional to 71,281, 98,254.46 and 56,149.72 is: 77,397.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,281 : 98,254.46 = 56,149.72 : x
  2. Step 2: Convert to fraction form
    71,281/98,254.46 = 56,149.72/x
  3. Step 3: Cross multiply
    71,281x = 98,254.46 × 56,149.72
  4. Step 4: Simplify right side
    71,281x = 5,516,960,417.75
  5. Step 5: Solve for x
    x = 5,516,960,417.75/71,281
  6. Step 6: Final answer
    x = 77,397.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.